This circuit appears elsewhere in this section, obtained from other documentation. The circuit is for lead-acid batteries and the lamp can be replaced by high brightness LEDs.
This circuit is from a 1976 documentation. It provides a pulsating DC voltage that can be varied...
This circuit is from a 1998 Electronics Now and can be easily assembled since it uses a common...
In this transmitter the supply must be made with an excellent filtering source and L1 is formed by 4...